stinking iris vs gladdon

stinking iris and gladdon both are nouns.

Word	Noun	Adjective	Verb	Adverb
stinking iris	Yes	No	No	No
gladdon	Yes	No	No	No

As nouns, stinking iris and gladdon are synonyms defined as:

stinking iris and gladdon: iris with purple flowers and foul-smelling leaves; southern and western Europe and North Africa

Other synonyms of stinking iris include gladdon iris, Iris foetidissima, roast beef plant, stinking gladwyn.

stinking iris (noun)	gladdon (noun)
iris with purple flowers and foul-smelling leaves; southern and western Europe and North Africa	iris with purple flowers and foul-smelling leaves; southern and western Europe and North Africa